Vinted's system is pretty ruthless, it will flag the same device ID or IP address in a heartbeat and just shut down your second profile before you even list a single item. The trick is keeping every shop in its own separate bubble, a different browser profile with unique cookies and a steady connection that doesn't link back to your other activity. This article is a proper guide on setting up and running multiple Vinted accounts
https://gologin.com/blog/best-tips-for-selling-on-vinted/ .